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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * accompanied this code).
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package org.graalvm.compiler.truffle.runtime.hotspot;

import org.graalvm.compiler.truffle.runtime.OptimizedCallTarget;

import jdk.vm.ci.hotspot.HotSpotSpeculationLog;
import jdk.vm.ci.meta.SpeculationLog;

/**
 * JDK 8, 13+ version of {@link HotSpotTruffleRuntimeServices}.
 */
class HotSpotTruffleRuntimeServices {

    /**
     * A wrapper that holds a strong reference to a "master" speculation log that
     * {@linkplain HotSpotSpeculationLog#managesFailedSpeculations() manages} the failed
     * speculations list.
     */
    static class CompilationSpeculationLog extends HotSpotSpeculationLog {
        private final HotSpotSpeculationLog masterLog;

        CompilationSpeculationLog(HotSpotSpeculationLog masterLog) {
            super(masterLog.getFailedSpeculationsAddress());
            this.masterLog = masterLog;
        }

        @Override
        public String toString() {
            return masterLog.toString();
        }
    }

    /**
     * Gets a speculation log to be used for compiling {@code callTarget}.
     */
    public static SpeculationLog getCompilationSpeculationLog(OptimizedCallTarget callTarget) {
        HotSpotSpeculationLog masterLog = (HotSpotSpeculationLog) callTarget.getSpeculationLog();
        CompilationSpeculationLog compilationSpeculationLog = new CompilationSpeculationLog(masterLog);
        compilationSpeculationLog.collectFailedSpeculations();
        return compilationSpeculationLog;
    }
}
